extenshi.io
SECURITY REPORT · EXTENSHI SCAN

Watchmarker for Youtube

Firefox extension·by sniklaus
95
/ 100 SAFETY SCORE
EXCELLENT
Looks clean. No meaningful risks detected in this scan.

Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue

How it ranks

Watchmarker for Youtube's safety score vs every other extension we've scanned
Globally
95.47%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked across every extension we scan
In its category
85.47%of its category extensions carry more risk
This extension
Riskier ←→ Safer
Ranked within its category
Findings
7
median 38Lower is safer
Risky permissions
6
median 1Critical + high perms
Total permissions
12
median 4All declared perms
Critical findings
0
median 2Severity = Critical

Findings breakdown

Automated security signal · 7 distinct issues across 6 severities
7
distinct issues
detected

Permissions requested

6 risky permissions of 12 total
6 high-risk permissions require attention
This extension requests 12 permissions in total. 6 of them grant broad capabilities that are worth a careful look.
High
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

High
Access browsing history

Can read and modify your complete browsing history

High
Execute scripts in pages

Can inject and execute JavaScript code in web pages

High
View open tabs

Can see URLs and titles of all open tabs

High
Observe web requests

Can monitor all network requests made by the browser

High
Block and modify web requests

Can intercept, block, or modify any network request before it completes

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Block requests with host access

Can block or redirect network requests and requires host permissions

Low
Schedule tasks

Can schedule periodic background tasks

Low
Block network requests (declarative)

Can block or redirect network requests using predefined rules without seeing content

Info
*://www.youtube.com/*

No additional information available.

Info
*://m.youtube.com/*

No additional information available.

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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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